Pattern mechanism for dobbies



March 9,1927. 71,622,345

J REYNQLDS PATTERN MECHANISM FOR DOBBIES Filed Oct. 1, 1925 4 Sheets-Sheet 1 March 29 1927.

J. REYNOLDS PATTERN MECHANISM FOR DOBBIES Filed Oct 4 SheetsSheet 2 March 29, 1927.

J. REYNOLDS PATTERN MECHANISM FOR DOBBIES 4 Sheets-Sheet :s

Filed Oct. 1, 1925 IHVENTDR:

I T-rnRNEqs;

March 29 1927.

J. REYNOLDS PA TTERN MECHANISM FOR DOBBIES 4 Sheets-Sheet Filed Oct. 1, 1925 W ATTSZZJEgS:

-m m b Patented Mar. 29, 1927.

UNITED STATES 1,622,345 OFF CE...

JOHN n-nYNo ps, on NEW BEnFonn, vrusseorrusnrrs, assreuon T BUTLER MILL,

r New 3m ,ms e evsi a s a .QQREQRAHON F MASSACHUSETTS- rerrsal MEQM S F911 .DOBBIES- Application filed Qctober 1, 1 Q2 5. eria1 No. ?,767.

My invention relates to a dob'by loom attachment whereby more particularly bordered fabrics such as handkerchief-s, napkins, and the like, may be woven, and it is an improvement upon an invention described by me in application Serial No. 626,529 filed March 21, 1923.

It has been devised to simplify construction and more particularly to produce a mechanism which while capable of controlling the weaving of patterns running lengthwise of the fabric as well as crosswise, may also be used by a slight adjustment to weave only lengthwise patterns. Heretofore when a lengthwise pattern was to be woven on such a machine the cylinders carrying the chains for both lengthwise and crosswise pattern weaving hadto be removed and a single pattern cylinder substituted, this requiring considerable labor and taking much time during which the loom could not be used.

My invention also comprises other improvements described below. The machine as a whole uses short pattern chains which economize space and construction expenses as in my previous specification above re ferred to, as well as expense in adjusting the machine so that it will weave fabric with a lengthwise border only. i

In the drawings Fig. 1 isan end elevation of a portion of .a loom with my attachment mounted thereon.

Fig. 2 is a plan showing the mechanism hereinafter described. 7

Fig. 3 is a longitudinal section of the pattern cylinders and their mounting.

Figs. 4, 5, 6 and :7 are sectiohs on lines {i4c, 5-5, 66 and 7+7 of Fig. 2.

Fig. 8 is a section showing the two cylinders combined to Weave a lengthwise pattern only by the use of a single chain.

Figs. 9 and 10 are end andrside views respectively of a detachable flange for each of. the cylinders.

1 indicates the frame on which the parts are carried. 2 is a jack whichlis .piivoted as at 200 to the harness lever .3. There are a number of these jacks and harness levers as is usual. The top and bottom of the jacks normally engage the top gift .4: and the bottom girt 5 as usual and each end of .each jaclrcarries hooks g6 and '7, thesehooks be ng ad pted t acces A top n te n bottom k ife These knives 8 .9 are attached to and operated by the rocker 1 0. Each top hook is supported. upon the rod 11 which is engaged at its lower end by a finger 12. Each bottom hook rests upon a finger.

13, these fingers being pivoted on the rod 14, their rear edges normally resting on the bar 15. All these parts are constructed and operated in the usual way, the rocker 10 being caused to rock by the usual rocker-arm (not' shown) and the lower end of the harness lever being slotted and forked as at '16 to engage the rod 17.

18 is the shaft on which the parts of the chain carrying cylinder mechanisms are mounted, this shaft and the sleeve 25 being Free to turn on the shaft 18 is a sleevev 25 \vhlch runs from a polnt near the flange 24 for some distance along the shaft. To

this sleeve is fastened to turn therewith a second cylinder 26 for the lengthwise-chain, in all respects like the cylinder though varying therefrom in width if desired. The sleeve carries a worm gear 27 engaging with a'worm 28 which is of the usual character and is mounted upon shaft 29. 30 is a plate of usual construction attached to the sleeve and having a .notch therein, there being pivoted to a lug on the plate a latch 31', the tip or engaging end of the latch passing through the" notch in the plate 30 and being adapted to fit into any one of the notches 32 on the hub of the worm gear 27. This construction forms aclutch to connect normally the sleeve and the worm gear, yet enable .thewvorm gear to be adjusted on the sleeve which is sometimes desirable. A spiral spring surrounding the sleeve 25 keeps theseparts normally in contact.

.911 the sleeve25 is also mounted onejmember '34 of a clutch, "the other member of Iwhioli comprises a notched guide plate 35 pinned to the shaft 18, and agrooved collar '86 carryingadatch 361' is also mountedon the shaft 18. The plate .35 it will be noted is beyond the end of the sleeve 25, while the part 36 is free to rotate on the shaft 18.

The groove 37 in the part 36 is adapted to receive a pin 39 attached to an arm 40 which throws the clutch into and out from operative position.

This arm 40 has a hub 41 mounted on a stud 42, this hub carrying a second arm 43, on the end of which is a. suitably shaped shoe 44 adapted to rest 011 a chain 45 carried by a chain wheel 46 mounted to turn with a sleeve 461 on shaft 47. The stud 42 is mounted on the end of a bracket 48 mounted on the rectangular frame 49.

V The shaft 47 carries near one end a worm gear 50 to rotate it, and meshing with a worm 51 on a constantly-running shaft 29. A clutch mechanism comprising a notched plate 53 fast on said shaft has upon one side of it a clutch member 54 free to move 011 said shaft and carrying a latch 541 wh1ch lies in the notch in the plate 53 and is capable of reaching into one of the notches 55 in the hub of the chain wheel 46 which will be turned by the shaft 47 while said finger and said chain wheel are in engagement. A spring 56 holds the shoe 44 in engagement with the chain 45;

The clutch member 54 is moved along the shaft 47 by means of a pin 57 mounted on the end of an arm 58 and running in a groove 59 in the clutch member 54.

To lift the arm 43 and hence operate the pin 39 to slide the'member 36 along the shaft 18, the chain 45 carries on one of its links a boss 451 so that when the chain wheel 46 is rotated and the boss reaches the shoe 44 it lifts it and causes the pin 39 to throw the collar 36 so that the latch 361 enters the notch in the clutch member 34 and thus causes the shaft 18 to rotate with the sleeve and the cylinder 20 with its chain to be turned.

The end of the arm 58 farthest from the pin 57 is attached to a spring-controlled rod 60, 62 being the spring by which'it is held in normal position.

This rod is mounted in the frame 49 at tached to the main frame 1, and is established in its normal position by a suitably adjusted spring 62. The rod carries at one end an arm 65 to which is attached by a spring connection a strap 67 which passes over a pulley 68 mounted on the frame 1, the other end of this strap being suitably connected with a hook 69 on the lower end of one of the harness levers.

Normally these parts are so arranged that the pin 57 holds the latch 541 in the notch in the plate 53 and the hub of the chain wheel 46 so that this chain wheel is normally in constant operation. Then the rod 60 is turned by the draft on the strap 68, which pulls down the arm 65, the pin 57 causes the separation of the clutch members so that power is cut off from the chain wheel 46 and the chain wheel stops, so that the boss no longer operates the pin 39. The rod 60, however, has an arm 600 at its outer end which carries a pin 601 running in a groove in the roll 70 on the shaft 18. The arm 660 has sufficient reach when the shaft 60 is turned to cause the roll 70 to push the clutch members 35 and 36 into engagement and so connect the sleeve 25 and shaft 18 that they will rotate together. The clutch member 36 is thus thrown into engagement with its other member 34 and the shaft 18 is caused to rotate with the sleeve 25 at the same instant that the chain wheel 46 is stopped. V

The links of chain 45 are all flat except that carrying the boss 451. The pin 39 is thus operative to move the boss 451 under the shoe 44 once only for each traverse of the chain and this by means of the momentary throw of the clutch turns the cylinder 20 an eighth of a revolution or the width of a linl The chain on cylinder 20 is of usual con struction exceptthat it has a number of blank or fiat links which are placed together in the chain in such position that they will be moved over the cylinder 20 at the times when the boss 451 causes the rotation ofthe shaft 18 and cylinder 20. Thus the rotation of the cylinder 20, caused periodically by the boss 451, will not change the weave, and the number of blank or flat links on the chain 45 and on the cylinder chain will determine the distance apart of the cross borders. Thus this mechanism becomes a measuring means by which the distance apart of the cross borders may be regulated. i Vhen the harness is to operate to cause the cross border weave the chain wheel is disconnected and the measuring movement does not take place.

When in the rotation of the cylinder 20 the fiat links on its chain have been exhausted a link of the chain having fingers 2-2 brings into operation the lever 3 in the usual way. This operates the arm 65 and rod 60 and moves the arm 58 so that the pin 57 will throw the clutch member 541 out of engagement with the chain wheel 46. This also turns the shaft- 60 which in turn moves the pin 601 at the end of the shaft 60 and pushes the roll 70 against the clutch member 36 causing it to engage its other member, thus giving movement to the cylinder 20 as long as the lever 3 is kept in operation, thus causing the weave of the cross border in the usual way.

The clutch member 36 is thus operated in two ways, first as a measuring element'by the pin 39 which in turn is operated intermittently by the, boss 451 on the chain 45 which lifts the shoe '44 and, second as a .ished the lever 3 and rod are allowed to fall back into normal position thus applying power again to the chain wheel and simultaneously releasing the clutch member 36 by pulling the roll back into normal position.

The movement of the chain wheel is so timed that when itis thrown out of engagement during the weaving of the cross border the boss on the chain wheel will be out from under the shoe 44.

It will be seen that this mechanism is capable of considerable adjustment because the number of links in the chain .45 may be *aried as well as the .number of flat links in the pattern chain of cylinder 20.

lVhile the flanges 23 and 24 of the cylinder 20 are alike so far as the function of centering the chain, where two chains are used, is concerned, the flange 24 is separate from the cylinder 20, instead of integral with it as in my former application, being attached to the shaft to rotate with the cylinder by a set screw 241. This flange is shown very much enlarged in Figs. 9 and 10,'an:l it will be noted that its circumference is made up of a. series of projections 242 between which are grooves 243, the flange being so constructed that it may be adjusted so that the grooves 243 will register with the corresponding grooves in the .cylinder or so that the projections 242 register with the grooves and so engage the edge of the chain and center it. The cylinder 26 also has a flange integral therewith and a second flange 261 adjacent the flange 24 and attached to the sleeve by a suitable set screw or other means. This flange is in all respects like the flange 24 shown in Figs. 9 and 1.0 provided with projections and grooves equal in number to the grooves on the cylinder 26 and similarly arranged with reference to those grooves.

It will be understood that the grooves in these two cylinders and the flanges 24 and 261 are equal in number and similarly disposed about the circumference of these several parts, the grooves in the cylinders being in the same straight line. Under ordinary conditions where two chains are to be used the two movable flanges 261 and 24are adjusted about their axes so that the projections of each serve to close the ends of the grooves in its cylinder and center its own chain as in Fig. 2. When, however, it is desired to use asinglechain of a width reaching from the outer flange of onecylinder to the outer flange of the other cylinder, as for example when a single lengthwise pattern is to be woven, the set screws which hold these flanges 24 and 261 to the shaft and to the sleeve, respectively, are loosened and both flanges are turned say one-eighth of a turn upon its axis to make the grooves of the flange register with the grooves in the cylinders, and the set screws are then tightened so that a link may extend from the right hand flange 23 of the cylinder 20 to the left hand flange 263 of thecylinder 26 as in, Figs. 3 and 8. A. chain of sufficient width to weave a single patternand extending from the flange 263 to flange 23 may then be set into the groove of both these cylinders and the flanges 24 and 261, this arrangement being such that the two cylinders together with their adjacent flanges become the equivalent of one long cylinder and may be operated as such by the proper adjustment of the harnesses, etc., thus eliminating the necessity of removing these two cylin dcrs ano substituting one long cylinder in order to change the pattern which the loom is to weave. In this case the clutch members 34, .35 and 36 will be held together by the roll 7 O or in any convenient way so that cylinders 20 and 26 will be rotated together.

At the extreme right end of the shaft 18 in Fig. 2 is shown a pawl and ratchet mechanism corresponding with a similar mechanism in my said application, 701 being the pawl and 71 being the ratchet. .A somewhat similarly-acting mechanism is shown in Fig. 1 where 72 is a wheel, recessed in its periphery, mounted on the sleeve 241 and having in engagement therewith a roll 73 mounted in a forked arm 74 which is pivotally mounted at 75 on the frame 49. A spring 76 holds the wheel 73 against the periphery of the wheel 72 thus allowing the wheel 72 to be turned and at the same time when at rest holding it yieldingly in aprodetermined position. This mechanism serves merely to prevent the parts from over-run-' ning their intended limited movement.

When in use power being applied to the gear 77, the shaft 29 rotated and this causes the rotation of the worms 28 and 51 which in turn cause the rotation of the worm gear 27 on the sleeve and the worm gear 50 on the shaft 47. During the weaving of the side borderand body ofthe handkerchief the sleeve 25 on which the cylinder 26 is mounted is operated continuously and the cylinder 20 on shaft 18 is operated only at certain periods.

hen the boss 451 on chain 45 lifts the shoe 44 it moves the pin 39 so that it pushes into engagement momentarily the sliding member 36 of the clutch on the shaft 18. This causes the cylinder 20 to advance an eighth of a turn, that is, one flat bar of its chain which does not affect the harness. As the boss 451 passes from under the shoe- 44 theshoe is depressed by the spring 56, This causes the pin 39 to push back the slit member 86 thus disconnecting the shaft 18 from the sleeve until further revolution of the chain 45 brings the boss 4-51 again under the shoe 44:.

These movements continue until the first bar of the chain, indexing the cross border and carried by the cylinder 20, is brought up under the fingers 12 and 13. This bar of the chain carries pins which index for the lever 3 raising the lever so that it pulls down the lever 65 and thus turns the shaft- 60 and causes the pin 601 to push the rolls 70 to the right and move the clutch member 36 into engagement with the member 34 so that the cylinder 20 will revolve continuously until the cross border is woven and a flat bar is moved out and the cylinder and the lever 23 are released. During this time lever 3 is kept in operative position by the usualmeans and the position 01 the rod 50 during this time depresses the arm 58 so that the pin 5? with lraws the finger from engagement with the plate 53 and the chain wheel, and the chain wheel. mechanism is inoperative.

When the cross border is finished the bar of the chain running on cylinder 20, which now comes into operative position, has no pins to index the fingers 12 and 13; hence the lever 8 is allowed to fall back into normal inoperative position. The spring 62 pulls the arm 58 back so that the pin F7 throws the clutch member 5&1 into engagementwith the chain wheel and the chain wheel again becomes operative. The roll is moved back again so that the clutch member 36 falls out of engagement with the clutch 34 thus releasing the shaft 18 from the sleeve 25 so that the cylinder 20 no longer rotates to give its pattern to the weaving except as it is operated intermittently by the chain wheel mechanism.

.ln Fig. 2 the machine is shown in position to weave the lengthwise border, the clutch latch 361 being in inoperative position.

In Fig. 3 the harness has caused the roll 70 to move the latch 361 into position to engage the member 34: and connect the shaft 18 and sleeve 25 to cause the weaving of the cross border.

It will be apparent to those skilled in the art that my invention as set forth in the claims may be in other forms than that above described, as I do not mean to limit it to the construction herein shown and described.

What I claim as my invention is ,1. In a dobby, a constantly running pattern cylinder carrying a chain, each link of said chain being provided with pins adapted to operate a harness mechanism, a second pattern cylinder mounted independently of but co-axially with said first pattern cylinder, said second cylinder also carrying a chain having links some of which are fiat,

the

on will operate said harness mechanism to cause the weaving of the crosswise border, and independent means for giving said second cylinder a further step by step movement whereby said chain thereon will be advanced step by step and said flat links will pass in proximity to said harness mechanlsm and the number of said fiat links will control the distance beiween the crosswise borders.

2. In a (lobby, two pattern cylinders arranged coaxially and independently of each other and each carrying a pattern chain, one of said cylinders being constantly rotated, the pattern chain on the second cylinder comprising a harness-operating section and a tlat section, means for periodically rotating said second cylinder continuously wliereby said chain may be advanced to cause its harness-operating section to operate the harnesses to weave a cross border, and means to 'otating said second cylinder by a step by step movementwhereby the fiat section of: said chain will be advanced one link at a time and the number of fiat links will. be an indication of the distance between said cross borders.

In a (lobby, two pattern cylinders mounted to be "rotated about the same axial line, each carrying a chain, one 01" said cylinders being constantly rotated, the other cylinder carrying a harnessoperating section and a hat section, means for giving saic second cylinder periodically a continuous movement whereby the harness-operating section of said chain will cause the continuous opcra 'on of the harnesses for a period, and means for giving said second cylinder a step by step movement whereby the flat section of the chain will be moved one link at a time.

In a dobby, two pattern cylinders, each carr ing a chain, means for rotating one of said cylinders constantly, means for retating the second cylinder continuously but periodically and means for rotating said second cylinder step by step, said last-named means comprising a chain wheel carrying a chain having fiat links, one of said" links earrying a boss, a lever resting on said chain and adapted to be moved by said boss, and a clutch mechanism connected to said lever and adapted to be thrown thereby to ensaid second cylinder with a source of power whereby as said boss moves said lever said clutch will momentarily connect said second cylinder with said source of power and said second cylinder will be given a fraction of a turn.

5. A dobby mechanism comprising an intermittently rotating cylinder, means for retating it and connections between said rotating means and said cylinder comprising a clutch, a lever connected thereto, a chain wheel carrying a chain, said chain wheel having fiat links and a link having a boss, one end of said lever resting on said chain whereby as said chain is moved progressively said boss will cause said lever to throw said clutch intermittently and give a step by step motion to said cylinder.

6. A dobby mechanism comprising a rotatable cylinder carrying a pattern chain having flat links, a turnable rod and harnesscontrolled means connected thereto whereby it may be turned, a rotatable chain wheel carrying a chain comprising flat links and a link carrying a boss, means operated by said boss whereby said cylinder will be given a limited rotating movement, and means operated by said rod whereby said chain wheel will be disconnected from its source of rotation and said cylinder will be given periodically a continuous rotary movement to cause the weaving of a pattern.

7. A dobby mechanism comprising a rotatable cylinder carrying a pattern chain having flat links, a turnable rod and harnesscontrolled means connected thereto whereby it may be turned, a rotatable chain wheel carrying a chain comprising fiat links and a link carrying a boss, means operated by said boss whereby said cylinder will be given a limited rotating movement, and means operated by said rod whereby said chain wheel will be disconnected from its source of rotation and said cylinder will be given periodically a continuous rotary movement to cause the weaving of a pattern, and the number of flat links on said chain wheel chain and on said pattern chain will determine the distance between the pattern.

8. In a dobby, mechanism for Weaving cross borders, means for determining the di tance between the cross borders comprising two chains, one having flat links and a boss and the other having flat links and links having harness operating pins, a chain wheel carrying said boss-carrying chain and a rotatable cylinder carrying said harness pin carrying chain, a turnable rod and means for turning it, and connections between said rod, said chain wheel and said cylinder whereby when said chain wheel is rendered stationary said cylinder will be rotated continuouslyand when said cylinder is disconnected from its source of rotation said chain wheel will be rotated.

9. In a dobby, two chain cylinders mounted co-axially and in close proximity and means whereby they will be caused to lo tate together, each cylinder having flanges, said cylinders having chain-holding grooves, the adjacent flanges of said cylinders being separable therefrom and being grooved to correspond with said chain-holding grooves in said cylinders whereby their grooves may be caused to register with said chain-holding grooves and co-operate with said cylinders to hold one wide chain extending over to the cylinders or may close the ends of said chain-holding grooves to form flanges adapted to center one chain on each cylinder.

JOHN REYNOLDS. 

